Carbureter.



K. MAYBAOH CARBUBETEB. Arrmomon FILED JAN. 15, 190s.

Patented @ct.12,1909.

KAEL MAYBACH, OF PARIS, FRANCE.

CARBURETEE.

Specification of Letters Patent.

Patented oct. 12, 1999.

Application led January 15, 1908. Serial No. 410,938.

To aZZ 'whom it may concern:

Be it known that I, KARL MAYBACH, a citizen of the German Empire,residing at la'ris, in France, -have invented certain new and usefulImprovements in Carbureters; and I do hereby declare the following to bea full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

The present invention relates to a carbureter and it consists in acarbureter characterized by the feature that the mixing proportion ofair and combustible remains the same with all number of revolutions ofthe motor and even with sudden changes notwithstanding the oscillationsand the inclined position of the car.

In the carbureters hitherto known the level of combustible, in order toprevent its overflowing in case of oscillations and of an inclinedposition of the car, had to be placed some millimeters beyond the nozzlemouth. The consequence of this was that the mixing proportion of air andcombustible did not remain constant with irregular revolutions of themotor which would be the case if the interior of the .level would lie atthe end of the nozzle mouth. A further inconvenience of the floatarrangement hitherto employed in earbureters is to be seen in the factthat the whole column of combustible between the float and nozzle mouthbecomes moved at each suction stroke and therefore has'to be renderedmore slow.. This was the reason of a heavy throw out or spraying ofcombustible when`the higher number of revolutions suddenly was changedinto a lower number. The reason of this was the inertia of the column ofcombustible in motion. Several attempts have been made to prevent thisirregularity by regulating the openings for the air suction or those ofthe combustible. The previous arrangements have been very complicatedand do not work with exactitude,

especially when the number of revolutions was changed suddenly. Theseinconveniences are completely obviated by the present invention in whichthe position of the level of combustible is placed at the highest pointof the nozzle, and in which the rocking motion of the column ofcombustible is changed into a continual equal motion. For this purposethe nozzle projects into .the combustible rising continually through anopen tube. The overflowing combustible is repumped into a collector sothat the non consumed part is in constant circulation.,y

The flow to this overflow tube is so regulatedfthat inno case morecombustible rises than is consumed.

The present invention is illustrated 011 the accompanying drawing by adiagrammatic view.

The combustible fiows from the collector or other supply a through thetube b to the open tube c and rises within the same. This rise isregulated by a throat cZ of such dimension that only the quantity ofcombustible corresponding to the highest intensity of work is allowed topass. The overflowing combustible passes into overflow tube e, leadingto a collector f provided with an aperture 7c leadingwto the open air.Owing to vthis aperture there is always atmospheric pressure at thepoint of outflow. The collector f is in connection with van airpump ZLreconducting the combustible into the collector a through the pipe z' bymeans of the suction and pressure valve g and the tube o. Thecombustible thus circulates completely and fills the overflow tube cconstantly up to its highest point. A tubular discharge device or nozzleZ, exact-ly adjusted, projects into the tube c and is attached to thecover of the tube e, the thickness of which and the distance from tube care so small that the level of the combustible is practically placed atthe highest point of the nozzle. The latter is surrounded by an airsuction nozzle m or other conductor for the fluid to be carbureted. Theconductor tube Z) may be provided with a cock 'n or the like by means ofwhich the flow of combustible may be stopped. The said cover of tube ethus constitutes a barrier acting to divert the main body of the liquidstream flowing out of tube c, while only a limited flow into the nozzleor conductor 'mA takes place through the discharge device Z.

The manner of working of the carbureter of the invention is thefollowing: The motor draws air through the nozzle m by means of suction,at the same time combustible through the nozzle Z. Even with theslightest suction effect the outflow of combustible always remainsproportional to the quantity .connection l,- but any spraying of thecombustible or other undue and irregular ejection thereof atthe nozzle,produced by the body of the combustible in the means forming the supplyfor said nozzle, is entirely avoided. This spray is an inconvenience inall carbureters with float regulation.

So far as I am aware, it is novel to provide, in a tubular structure forconducting the carbureting liquid. into .operative roximity to theiiui'd to be carbureted such structure having its discharge endprojecting upwardly and open), a tubular discharge device such as Zhaving less external diameter than .the internal ldiameter of the'disthe cover of pipe e) closely disposed opposite to but spaced from thevupwardly openend of said structure and having a limited liquid escapeorifice. `I therefore claim these features broadly.

The lreconduction of the combustible Afrom the collector f into thecollector acan be effected .automatically or by hand continually or not.The described arrangement by means-of the pump z. is especially goodvfor this purpose. The same is arranged in' such a manner that thesurplus of combustible is reconducted without having been in connectionwith the lubricating oil of the pump, thus becoming dirty, the valvesand the pump being separated sufficiently and the (pipe o) between thevalves g and the pump L lis sufficiently long to pre vent this. Thepiston of the pump L is directed upward so that no oil is allowed toflow into the valves.

The collector a lies on a higher plane than the nozzle Z so that thecombustible is led to the nozzle at the natural pressure. vO11 motorcars the collector generally lies on a lower plane than the nozzle sothat the combustible ofthe collector'must beset under-pressure. Thissetting under pressure can be effected very easily with the arrangementof the present invention by means of the pump h. For this purpose such aquantity of air is pressed into the collector together with thecombustible as the machine consumes combustible.

Claims:

1. In a carbureting apparatus, the combination, with means for directingthe flow of device arranged inthe upper end of said" structure andhaving less external diameter' than the internal .diameter of the same,the upper ends of said structure and the discharge device beingapproximately in the same plane, substantially as described.

2;' In a carbureting apparatus, t-he combination, withmeans fordirecting the flow of the moving body of fluid to be carbureted,

of a supply for the carbureting liquid, means for conducting thecarbureting liquid from the supply into operative proximity to the pathof flow of the moving body of fluid to be carbureted comprising atubular structurehaving its discharge end projecting upwardly and open,and means, comprising a barrier closely disposed to but spaced from theupwardly open end of said structure and having a relatively limitedliquid escape orifice, for diverting the main body of the liquid stream'flowing from said structure and allowing only a limited portion of saidstream to escape into the path of fiow of the moving body of fluid to becarbureted, substantially as described.

3. In a carbureting apparatus, the combination, with means fordirecting'the flow of the movin body of fluid to be carbureted, of asupply4 or the carbureting liquid, means for conducting the carbureting.liquid from the supply into operative proximity to the path'of flow ofthe moving body of fluid to be carbureted comprising a tubular structurehaving its discharge end projecting upwardly and open, means, comprisinga barrier closely disposed to but spaced from the upwardly open end ofsaid structure and having a relatively limited liquideSc-ape 'ori.

stream fiowing from said structure and allowing only a limited portionofy said stream to escape into the path of fiow of the moving body ofHuid to be carbureted, and

an overflow-tubedepending lfrom said bar-- rie'r` and inclosing thetubular structure, substantially as described.

4. In a carburetin apparatus, the combination, with lmeans or directingthe flow of the moving body of fluidl to be carbureted, of a tubularconducting means for the carbureting liquid having endv portions thereofextending upwardly into operative (plroximity of the path of flow ofsaid bo vof Huid and the one arranged within the other,

a tubular discharge device arranged in the top of the relativelyinnerend portion of fce, for diverting the main body of the liquid.

said conducting means and having its top conducting means between saidvalves, subin approximately the same plane as the top stantially asdescribed. 10 of said end portion, the other end portion In testimonywhereof I afIiX my signahaving a barrier disposed closely to thedisture, in presence of two Witnesses.

charge end of the inner end portion and KARL MAYBACH. carrying saiddischarge device, suction and Witnesses:

pressure valves arranged in said conducting H. C. COXE,

inea-ns, and "a pump connected with said MAURICE ROUX.

